<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=0">
    <title>smiledemo</title>
    <!-- iphone5 1rem = 16px -->
    <style type="text/css">
    </style>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
    <script type="text/javascript">
      let htmlwidth = document.documentElement.clientWidth || document.body.clientWidth
      if (htmlwidth > 750) {htmlwidth = 750}
      let htmlDom = document.getElementsByTagName('html')[0]
      htmlDom.style.fontSize = htmlwidth/20 + 'px'
    </script>
  </body>
</html>
